Keep Final Fantasy away from Tekken, please.

 While Miss Italian Senate, is far more better suited for Tekken than Mr. Heavenly nightlight, Final Fantasy should be kept away from Tekken as far as possible, especially when Soulcalibur exists. So stop being so retarded and quit asking for Tifa in tekken 8! Especially since we have Zell Dincht who ALREADY LOOKS LIKE A TEKKEN CHARACTER... or... hear me out:

Motherfucker just suplexed a train!

All jokes aside, why a guest spot on Tekken, when we could get an entire fighting game based on FFVII. HEAR ME OUT!

It could be based on Advent Children, or be based on events AFTER Dirge of Cerberus. 

Gameplaywise, it should be a cross between Soulcalibur and Ehrgeiz. Implement a basic Materia system (no summons) to customize the characters a little. 

Let me use Playstation layout to explain better:

□= weak attack

🔺 = Medium Attack

×= jump

○= Block

L1= Limit Break Toggle

L2= Throw 

R1= Magic Toggle

R2= Item Toggle 

The toggles are for selecting on the fly. Let's use Cloud as an example:

Limit toggle:

□= Cross Slash

🔺 = Blade Beam

×= Braver

○= Climhazzard

Magic Toggle allows you to use any of the up to four magics that can be attached via materia.

Available magics:

Fire (fires a semi-homing fireball)

Ice ( fires a non homing wave of ice in front of you)

Bolt (lightning strikes in front of you)

Quake (creates a shockwave around you that stuns opponents)

Bio (creates a poisonous cloud around you. Once opponent is poisoned, your MP begins to drain. Effect lasts until your MP is drained.)

Silence (creates a small cloud in front of you. Once it connects, your opponent can't use magic until your MP is drained.)

Barrier ( creates a shield around you that reduces damage and lasts until your MP is drained.)

Cure (restores HP)

Depending on which Materia you equip and WHICH Slot you assigned it determines which button accesses it.

Other Materia:

Elemental: If attached to an elemental magic (fire, bolt, ice, quake) you can either make your physical attacks have that element's attribute or you can nullify the damage from that element.

Added Effect: same effect as Elemental but for Silence and Bio. When used with Cure Materia, it can drain HP when physically attacking (if slotted in A weapon slot.) Or turn Cure into Regen, which fills up your HP as long as you have MP.(if slotted to armor) When used with Barrier, physical attacks can drain MP (if slotted to a weapon) or it can refill your MP when attacked. (If slotted to armor)

Long Range: increases your attack hitbox size but reduces the damage.

Deathblow: increases your physical damage while it drastically lowering your defense

HP+: increases your total HP 

MP+: increases your total MP

Steal: Physical attacks can take items from Opponent (as long as they have items and you don't)

Final Attack: it lets you cast a final spell the moment you're KOd (only works once per fight and disables the MP and Limit Bars for the rest of the fight. Only available in PLAYER VS CPU Matches.) 

Item toggle allows you to use one of four items selected at random before each fight.

Available items:

Potion (low level HP restore)

Hi-Potion (high level HP restore)

Ether (MP restore)

Remedy (removes poison and silence statuses)

Hyper (increases limit gauge filling, but lowers defense)

Tranquilizer (lowers limit gauge filling, but raises defense)

Light Curtain (adds barrier status)

? (Causes any of the previous effects)

Stages would be based on the world of FFVII and have stage hazards. For example, in the Zolom swamp if  you're in the water, a Midgar Zolom may pop out of the water and cause you damage. Inside Mako Reactors, steam can shoot from pipes and cause you damage, etc. 

Guns:

They would work like shotguns where the closer you are, the more damage they do. Also, shooting them would be relegated to the non-comboable Heavy Attack, which is Square + Triangle.

Red XIII:

Since I mentioned Advent Children and Dirge of Cerberus, Cait Sith and Red XIII would be a team character. 

Now so far this game kinda sounds like Ehrgeiz 2.0, which isn't exactly wrong, but the Soulcalibur elements would be the alternate weapons with other effects like, say:

More Materia Slots, stat increase/decrease, alternate outfits. 

Create a character and have weapons that are not from the normal FFVII crew, like say:

Short swords, Rapiers, Gunblades, etc. These could be Based on classic FF classes.

DLC characters could have themes, like say: Echoes from the Lifestream would be Sephiroth, Aerith, Zack, just to name a few. 

Now tell me that Tifa in Tekken is mucb better than an actual FFVII themed fighter.