Fort Max would actually be interesting. The mould should be there, or close enough to being there, for TakaraTomy to use, since 2000 saw Brave Maximus' release.

While I have Fort (and Brave) Max, I'd love the chance to grab another, if only for the minor parts I need. It'd still be cheaper than nabbing them off eBay.

Plus there'd be the chance for them to do Grand Maximus - which isn't much of a stretch since Fort & Grand Max both appeared in the Japanese cartoons. Granted, Fortress got much more airtime in Headmasters than Grand got in Masterforce, but from a Japanese market POV Grand Maximus isn't at all obscure. And of course, I'd grab a reissue Grand Maximus without hesitation.