Losing Axe was inevitable eventually, albeit the timing and how it eventually came about were infinitely more tragic with the death of Helen McCrory. Even though (much like another Damian Lewis series) I think Billions should've ended long ago, I'm glad he's coming back towards what will (hopefully) be its end.

The introduction of Corey Stoll's Mike Prince was a solid enough remedy to losing Axe, although I think the season's overarching story and somewhat too-late criticism of billionaires left the series without a very clear sense of purpose or place; it spent too long painting its characters as flawed themselves, but doing nothing to criticize or otherwise caricature their ridiculously wealthy lives like, say, Succession does. More than that, it went the opposite direction, painting the Axe Capital cast of characters as universally "cool" (excepting 1-2 Big Bang Theory-style "nerd" caricatures written in later); they like "cool" things, drive "cool" cars, and the entire cast speaks fluently in that Billions-patented shorthand of "cool" references (to make you feel "cool" too whenever you recognize the reference), even though sometimes the dialogue feels like Sorkin's zippy West Wing walk-and-talk writing--but if Martin Sheen, Allison Janney, and Bradley Whitford were constantly trying to work references to Steve McQueen and Paul Newman movies into literally every exchange about foreign and domestic policy.

I really enjoyed the Mike Prince arc of the most recent seasons, especially early on when we're as skeptical and in the dark about his goals and motives as everybody else in the cast; I wasn't a fan of the outcome, but I think at the beginning the idea of basically an anti-Axe who appears genuinely preoccupied with using his wealth and resources to improve the lives of others and his community was inspired. He couldn't replicate Lewis'/Axe's presence, so they didn't even bother trying, and somehow managed a delicate balance between slowly winning the cast (and audience, by extension) over to his character's seemingly utopian "vision," while still acknowledging his god complex and major flaws as a person/husband/etc.

That said, I think bringing Damian Lewis back has a lot of potential, but could just as easily topple things just as this new version of Billions had found its footing. At the very least, it will be good to see Wags' reaction. I still think the series should've ended with like, the second/third season (honestly, maybe even the first, if they'd left it a little less open-ended). Like with Lewis' time on Homeland, I think it could've been a phenomenal character study as a limited or even anthology series, but it's still been solidly entertaining and certainly doesn't wast such a talented cast.