no
He won't, but it would be awesome if he did. Rocks shouldn't appear in Ben 10 at all, because he's just a rip off of Diamondhead. Technically, he won't "return," since his only appearance was non-canon, so if he do appear in Omniverse it would be his debut. Here are the abilities that I would give Squidstrictor if he appeared in Omniverse.
Squidstrictor:
Elasticity
Enhanced Agility
Enhanced Strength
Ink Projection
Stick to Walls