Yes, but interestingly, he still seems to have approached Steve regarding a new Maiden album.
My tinfoil hat take on it is that
if Maiden had previously decided to hang it up--a possible motive as to why Bruce is restarting his solo career--he's trying to change Steve's mind by doing a new album and keeping the Maiden thing going longer. Keep in mind,
AoB and
TCW received some of the best critical reviews of his career. Financially and crowd-wise, though, he was going nowhere. That's ultimately why he came back to Maiden, and he did so with two demands--hire a top-notch producer and make the best album possible.
So, the "top-notch producer" thing lasted one whole album before Steve started getting his fingers into things again and muddied up the production on every succeeding album. From an armchair perspective, it would make sense that Bruce let that demand go after
BNW simply because he was back in front of monstrous crowds again. Keeping the Maiden machine going keeps him in front of those monstrous crowds. Once solo for good, the arenas and stadiums will be a thing of the past.
Or he's just genuinely excited to do an album with Simon. Who knows.