Aramaki being a logia is very surprising judging by the way his powers work, but i guess if it's true that Oda simply wanted to go through his nature related powers being logia thing.
At the same time, it was about time that we saw top tier logias in action. I'm curious to know how Oda would make them fight at this stage, and especially how their potential awakening would be developed
About the news concerning Sabo, i'm assuming that just like i mentioned in this thread:
https://worstgen.alwaysdata.net/forum/threads/the-fate-of-the-shichibukais.28818/, Sabo is simply framed for Cobra's death unfortunately, though the title "Flame Emperor" reminds me of Ace