So I posted a thread about a week ago or whenever about my thoughts at the time of what characters should be in MK10 (
http://testyourmight.com/threads/mortal-kombat-10-characters.38821/page-2#post-1181299).
After seeing a few more threads about similar subject matter and having people add to the discussion, I've changed my opinions on which on which should be in it a bit. But more importantly, I've thought about how the mechanics of it should be. So here's a bit of both presenting ideas and fantasizing.
In my opinion, I believe MK10 should be in a similar vein as Injustice. Hear me out here.
Mechanics and gameplay:
First and foremost, keep it 2.5D. What they had with MK9 was perfect. It would be pretty hard to take the series into 3D again and have it live up to fans expectations.
Secondly, have interactables. It would add a whole new layer to the gameplay as it has with Injustice. Just thinking of what kind of stuff they would be able to do in the MK universe gets me excited because of how much more gruesome and cringe-worthy they would be. Besides the aesthetically pleasing aspect of it, imagine you're fighting in Reptile's Lair and you knock the opponent into a statue in a corner that spews acid on them, giving you a nice twenty or so percent free damage. Or you're fighting in The Prison and you have a prisoner grab the opponent, setting them up for a new combo. And as a defensive example, you're backed into the corner in Goro's (new) Lair and you swing one of the chains dangling from the ceiling at the aggressor to give yourself some breathing room.
Thirdly, have transitions or bring back death-traps. There's two ways of going about it. First option; have transitions be brought in and have them function like they do in Injustice, except instead of doing a b3, do a d2 or a specific special move (eg: Scorpion's Back-flip Kick) to activate 'em. Second option; bring in death-traps and have players meet the criteria of using their whole meter to activate it. They would, of course, function like they did in Deception and Armageddon and only count as winning one round. Have them be on a one side of the screen or both, vary them between stages. In terms of execution, though, don't have them be as big of a flashy move as X-Ray attacks, that's for the Death Trap itself. Give the move a look like that of a Enhanced move but with a distinct aura or something around the character to allow the defender to notice and attempt to avoid it.
Next up, keep the button layout how it was in MK9. None of this 4 for Character Power business, keep it as a button for each limb. Maybe bring in Character Powers, though. Replace Stance Change with it because, as for I know, that only applied to Kung Lao for ONE combo so it was almost entirely useless. And, obviously, have a button solely for blocking. It's been in MK since day one, so there's no need to mess that all up. And yes, I'm also saying this because it's hard as fuck to re-act to Scorpion's fast tele-punch in Injustice and block it by holding back. Holding back to block works in games like Tekken, Street Fighter, Killer Instinct and, for the most part, Injustice. Not a game were a fair amount of the cast have a teleport-behind-you-and-hit-you move.
Now when it comes to the characters and their mobility, keep it how it is with MK9. Don't have some character move dreadfully slow with an annoyingly slow jump arc when another can move relitavely fast yet have an awkward jump arc like in Injustice. Every character on the playable MK9 roster aside from Sheeva was almost the same height and build in both genders. Also, a new running mechanic similar to that of MK3 and 4 should be implemented. It would open up new combo opportunities, allow characters that have noticeably slow movement (eg: Reptile) to move around easier and, like interactables, add a new layer to the gameplay.
Finally, the meter system; I wouldn't want to see them bring in the Clash system because it sucks. Bump up the number of bars to four, but keep it as one bar for an enhanced move, two for a combo breaker, and three for an X-Ray attack and all four for the Death Trap move.
So yeah, there's my ideas on how MK10 should be. Hopefully you've actually read up to this point, so why not add to the discussion as well?