Since they are just going to have the UMK3 HD Version they should add the MK3 exclusive stuff with UMK3. For example:
The Bank and Hidden (Red) Portal Arenas should be added to UMK3 HD since these where only in the MK3 Version.
Sonya's Friendship was different in MK3 where she moved her arms back and forth in a weird goofy way and in UMK3 she did her win pose and flowers grew out of the ground. I think in UMK3 HD she should have both of these Friendships.
In UMK3 there is no MK3 Bios, only Bios of the new added characters exclusive to UMK3, I think in this UMK3 HD Version we should have Bios for everyone in the game. Also MK3 has full body portraits where UMK3 Bios do not, I think we should have full body Portraits back for everyone in the game.
MK3 Endings had Original art pictures for the endings and UMK3 had Versus Screen pics, I think we should have our Original Art Pictures back for UMK3 HD.
MK3 Noob Saibot used a Kano Shadow and in UMK3 Noob Saibot used a Ninja Shadow, I think in UMK3 HD we should have both, either at random or different ways to fight these 2 versions.
MK3 Wavenet and UMK3 Wavenet you where able to put in a code to play as Noob Saibot, I think UMK3 HD should be based off the latest version of the game in arcades which would be the wavenet version, there for I think Noob Saibot should be playable, and actually both versions MK3 Kano Shadow and UMK3 Ninja Shadow.
In UMK3 you have to cycle thru all the UMK3 exclusive arenas twice before being able to play thru the MK3 arenas, this I think is a horrible design, made since in arcades b/c they wanted people to see what was so new about UMK3, but now its just annoying, They should all MK3 and UMK3 cycle thru once, maybe even mix up the order for UMK3 HD Version.
Rain in the UMK3 intro should still be there even if they dont use him for the game, but would be really kool if they decided to make him playable in UMK3 HD, but I doubt it.
I cant wait to get this game and play thru it and see what they decided to fix or change or what they left the same. Hopefully they have thought about this and made a true solid UMK3 that contained all the MK3 exclusives, but only time will tell.