Now, barring all excuses, and assuming that Jerwin will come in healthy 100%, no problem with the weight whatsoever, then maybe he will going to beat Martinez as expected by the majority here.
If that's going to happen then the majority of us will celebrate, but the way I see in their past fight, Ancajas was struggling against a more aggressive fighter, it was Martinez who dictated the tempo, and the good thing for him is that he can take the punches of Ancajas, there was no killer punch from Ancajas in that fight, and worst is he got exhausted.
And that i what Ancajas need if he wanted to win this rematch he need to throw solid combinations that will allow him to shake Martinez if same thing happen and Martinez dictates the tempo and have that good dominance, it will be a one-way fight that will favor Martinez, there are lots of adjustment aside from being healthy and maintain the target/required weight.
Though we can speculate but the outcome will depend on how both fighters deliver and execute their plan to beat each other.
It will be different take from different gamblers, own analysis and perceptions between these two fighters.