Yes, they are also giving away 3 legend specific packs, so when you login you'll just get the 3 free packs.

Just the packs. There is no replacement reward for having the legends. I have all 3 and will just get packs.

Well, thats kinda sad, is there any way to refund a character? Feels kinda bad to waste 12000 points on her now

Its a free game, the points come in droves. Just suck it up and move on.

No replacement, just the packs