The match with Ioka is not possible now if Ancajas will lose. I also don't think that stepping up weight will regain his reputation. It's good to move up weight after a winning match instead of losing 2 times in a row and just to avoid Martinez in the future, he will jump on another division.
He needs to win here, but if he losses, there's no other way but to move up in weight, though it will not hype him but IMO, that's the right thing to do for him to be comfortable in maintaining his weight. He will have to start his journey in a new division and hopefully we will continue to support him.
What we are talking are just the possibilities, but it might change if he wins the rematch.
That's right if he will move up after losing he will start his journey from the scratch again, unless his handlers have a strong connection and established a good money fight for him on his new division, that's only an opinion but for now he should not think about that just focus with this upcoming fight and comes up inside the ring bringing everything he got.
Just do things one at a time. If fate will let him win this rematch, he can move up with a much better hype.
A possible good money fight might await him on his new journey..