[Spoilers] The Flying Thunder God Technique is not entirely lost!

[Tsunade Senju]

I am wondering? How did Tsunade know how to make the markings of the FTG? or someone else put the markings on her?

 

[Hansom]

His speed in KM is already fast enough to avoid raikage's ultimate punch so i dont think he needs ftg :|

offcourse he needs it... he can teleport to another place in an instant..
remember FTG is not speed it's teleportation..​

 

[Facebook]

I am wondering? How did Tsunade know how to make the markings of the FTG? or someone else put the markings on her?

The 3 Shinobi's have the Mark on Tsunade and I believe her Slug. They would know how to make the Mark if they know how to use FTG.
One plan they made was to send the Slug to The 4th Division and then use the FTG to send Tsunade there... Meaning, Mabui would use her Jutsu on the Slug, then Shikaku would call the 3 Shinobi they would teleport to Tsunade, then Teleport her to her slug after... Thus she would be at Madara's Division.
But Tsunade wanting to save time, and less Complications went by Mabuis Jutsu with Raikage... Who was also Injured when arriving....
If i Explained too much,Sorry just wanted to add extra details so you won't have to Post back asking why...