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I don't, but then again I disliked the film.
I can't imagine that's true though.

Nope.
We won't know, till we see it.

I like the Raazer aspect, just not the fact that Judd was once tall.
Had Raazer just taken him over and caused him to age slower/be cursed with immortality I'd have been fine with it.

Alpha's strongest chance is their ties to Wolverine.
Guardian, Vindicator, Marrina, Shaman, Snowbird & Sasquatch would work as they fit a niche not seen in the Fox-verse (Alien + Mythical aspect).

I genuinely don't think any of the Alphans would warrant a solo film.

For every Guardians there's a Catwoman.

For every Arrow there's a Constantine.

There's never a guarantee. I highly doubt AF would be well received, personally. I'd like to be proved wrong...