You guys forget that Assassin Guyver was affected by the dimensional ripple, one stayed in the W'Kar universe and the other will show up sometime in future in Warrior Guyver's universe.
Alkanphel can use a guyver to heal and he is not talking about bonding with a unit?! I wonder how this is possible... Hmm, well I can't wait to see.
Well if Alkanphel hadn't been dying like he is now, Guyver 1 and 3 would making up their wills.
McAvoy has pretty much nailed it on the head. Guyver Alkanohel would a 4000x guyver zoalord vs. the 200x guyver zoalord in the time war. You can sure as hell bet that the Creators would send in their enture army to kill Alkanphel.
The only way I see that possible is to have him enhanced by the Matrix so he can also abosrb organic stuff. Namely his body, so he can have his body back.