2/10. Sorry, but it's a bad roster. Over 45 characters? No way that's happening. Waluigi? Nope. Keeping Lucario instead of replacing him with the Gen VI rep (or whoever it will be)? No way. Adding Pac-Man but not Mega Man? Epic fail!
You said to rate it on how likely it seems. Seems pretty freakin' unlikely to me.
Please don't give a low score just because of one character.
Can I give you a high score just because of one character? 10/10 for Shulk.
...Fine. 8/10 for likelihood. I simply cannot consider Waluigi more likely than Bowser Jr or Toad, so that absolutely has to enter into my evaluation. I also don't think Ghirahim and K. Rool are roster locks, either. But otherwise, seems reasonable.
"Champions don't whine, they win!" - Vangarre from Xenoblade Chronicles "Soon we will see Pokemon XXX." - Kooky_von_Koopa