Question: How good is Sasuke with seals? And is it possible for him to learn FTG. Sasuke has already shown exceptional knowledge in seals when he reverse engineered Kakashi's sealing jutsu in order to resurrect Orochimaru, this and his current constant encounters with FTG might lead to him discovering the mechanisms of the seal and utilizing the jutsu. Though I don't think he will learn FTG I do think its possible.

What do you think?
Producing the inverse of a seal is much easier and quicker than knowing how to perform the initial seal itself. That's pretty much to the point of common knowledge in real life too. For example, see Jiraiya using a five fingered seal release on Naruto during the Chuunin arc. Yes, I know Orochimaru's seal was "crude."
Also, "recent battlefield encounters" are not the same as "constant encounters," especially when dealing with fuuinjutsu, for which there is no precedent that a doujutsu will aid in learning the technique. The Raikage has more experience than Sasuke with FTG, even though Sasuke is a genius (thus requiring less time).
Finally, please edit your title to space-time travel, as that's what you're talking about.
-Peace
I don't understand why you don't think Sasuke will learn flying raijin. He'll probably use flying raijin level three. This is like making a thread asking if it's possible for Sasuke to obtain rinnegan. At this point all of the evidence indicates that yes, Sasuke will be the successor of the 4th hokage's jutsu
What evidence? Do you know the requirements to perform the FTG jutsu? Why did the technique go from the 2nd Hokage to the 4th; thus skipping the 3rd (aka "The Professor" for his knowledge of all the Konoha jutsu) and Hatake Kakashi? Why does it take Genma and two others to perform their version of FTG to teleport Mei (taught to them by Minato) whereas Minato teleported the entire Kyuubi by himself. Is there a physical limitation involved that Sasuke does or does not satisfy beyond a simple knowledge restriction? There are no answers to these questions as of now. Please weight your opinion appropriately and state it as such. Thank you
-Peace
ftg isnt that easy to figure out think about it minato leaves kunai on the battle field yet no other village has figured it out
It's unclear what physical and knowledge requirements are to perform FTG at this point in the manga.
-Peace
Sasuke will get the time slowing Technique
Does this even exist...? I've been gone for almost a year, and I come back to the same rumors... I'm sorry, but that's disappointing.
-Peace