Another thing to remember is Shawn has freinds...
One power bomb from sid nash or hall or a pedigree from hunter and warriors in the casket.
We've seen it with Yokozuna at rumble 94, I could see Shawn doing it.
Face Shawn is great, but that's not who would be fighting the warrior here.
Interference is an awful argument.
All three of the people you mentioned were rivals of Shawn Michaels for as long as if not longer than they were friends, there's every chance they'd lay him out instead.
Interference is an awful argument. Not to mention the fact that even if you did go down that road, Warrior could easily have his former tag team partners Randy Savage and Hulk Hogan to defend him. See? Ridiculous.
This post sums up pretty neatly what the whole argument for Michaels has been - grasping at straws. Klunderbunker is up there saying Shawn was better as a face and this is the time we should consider. Other posters are saying, no actually, he's better as a heel. He won his biggest matches as a heel when wrestlers who had nothing to do with him attacked his opponent. He made heavy work of anyone he beat as a face.
The two main arguments in favour of Michaels appear to be: 'he would outlast Warrior', despite there being no evidence of Warrior ever losing a match because he was tired. And 'Shawn would find a way to win'. Again, despite their being reams of evidence to the contrary:
As a face in his second run, his record is piss poor, as I've shown earlier, to the point that KB has, wisely, chosen to narrow the prime of Michaels considerably. As a face in his first run he beat Diesel, who was on his way out of the company in his first encounter, and he beat Mankind by DQ. They were the only wrestlers he beat at the first attempt. Sid, an aging Vader and British Bulldog, all of whom have been eliminated from this tournament already, took multiple attempts for Michaels to beat. Michaels as a face never won decisively against big names, and certainly not in the first encounter.
As a heel Michaels is not resourceful like Ric Flair, he relied on a numbers game. But the thing is, often his own guys weren't really enough. In his big wins against Undertaker, he needed Kane to attack him, because even the entirety of DX couldn't help him sufficiently. Again, he needed multiple matches to actually get a win, completely gifted to him by Kane.
His only other feuds as a heel in his first big run on top were against Austin, which he lost, and Bret Hart, which he needed an entire company to do the dirty on one of their employees. Michaels doesn't find a way to win himself, and never has.