True. In theory, not long after the Tenryou island incident, the 1st grand games ahppened. The games are only a way to get the magic needed to open the eclipse gate and travel backwards through time but...Well I have been thinking about that the past few weeks as I got up again with the anime (I just watch the anime once in a while, then let the episodes again pile up for a few months, then watch all those new episodes and repeat the same cycle) and the more I think about it, the less this entire situation makes sense.
Let's recap: As I have understood it the Grand Magic Games have been held for 7 years, meaning it was already held in the year Tenrou Team was locked in the Fairy Sphere. For the normal people it was just entertainment and to decide who is the number 1 guild, however the original purpose from the start was the Eclipse Project and the driving forces behind that were Arkadios and the Princess and the reason as why they did that was because Future Lucy notified them about the future.
If that's true it means Future Lucy has been around for 7 years, meaning she was already there in the same year the Current Lucy got trapped in Fairy Sphere and that everything related to Zeref and the Eclipse Project finds its origin in Future Lucy. However Future Lucy came from the future to avoid some kind of catastrophe. If all of that is correct, it means we absolutely know nothing about what this catastrophe now exactly is as everything related to the Eclipse Project and the Grand Magic Games was to prevent this catastrophe. So hypothetically speaking if Future Lucy didn't come to the past, there wouldn't be something like Grand Magic Games and an Eclipse Project. So what is this catastrophe then? Unless of course Hiro uses the theory of that the past nor future can be changed and that time travel is part of the timeline itself and thus can't change the original flow of time as traveling to the past was from the very beginning a part of it and by Lucy doing so she might have caused this catastrophe by attempting to avoid it.
The biggest problem is that Hiro isn't really clear on the details on how much Future Lucy now had an influence on the Eclipse Project and when she now exactly came to the past? I mean if she came 7 years ago, what did she do then all this time? Was the Eclipse Project then really the only way to stop this incoming catastrophe?
No matter how you look at it, as Jellal said there are things here that don't make much sense.
a) lucy witsnesses that something horrible happens in the future and thus, in the future, uses the 12 zodiac keys to return to the past using some unknown means (she can't use eclipse because eclipse wasn't made in her original time-line) to come and warn the princsess that she needs to avoid the catastrophe by building the eclipse gate for some unknown reason (it mustn't be to time travel...Lucy from the future got here from a future with no eclipse gate so its not needed to travel) and arrives 7 years earlier than the team is set free. She then gets the princess to work on all this and etc etc.
b) the eclipse gate is something that only exists in one time line and lucy consumed the one in her to come back thus needing a new one to time travel again. weird... but plausible. A time travelling or manipulating device should be beyond the grasp of time, existing only once in the whole series of timelines thus the need to make one after you travel with it. This way, Lucy from the future must wnat to warp the team of the past for the future to prevent the catapshro from killing them, thus bringing them safely to the future, post catatrophe.
c) the eclipse gate has nothing to do with time travel and its all a rouse. Lucy wants to open it to flood the world with some celestial ubber power to use it to prevent the catastrophe from ha++ening.
d) hiro is still drunk from egnog >_>
ITs a bit of a mess when we deal with time travel. Personally, for me, the Eclipse Gate has nothing to do with Time Travel. Lucy from the future in theory didn't have it and she still travelled back. Not only that but the Princess wants to use it if Lucy proves to be wrong, meaning that Lucy's time travel had nothing to do with it. It most likely will simply serve as a gate way to the celestial world or something like that. But this brings me to another question: how did Lucy travel backwards in time?
The thing she wants to avoid: the dragons returning and laying ash to the world. We saw Igneel and Grandine talking about being time or almost time. Its probable that Acnologia, the dragon slayer turned dragon, will lay waste to the world. In an attempt to stop him, the dragons return to fight him. The catastrophe may be the appearance of acnologia in the town, killing all the mages and FT members in the process.
Oh and Zeref? He's 99% bound to be Acnologias Dragon Slayer. So his role is either to kill it or aid it in this catastrophe.
PS-Sorry for the spelling. iPad.