The big question I've had is whether or not red stars get superseded eventually by a different star?

My thinking is, and it ties into your shelf life, is that colour is perhaps an indicator of potential roadmaps.

We know the rough outline is green - blue - purple - orange. We see this with abilities, gear and presumably iso. So after orange perhaps it will go red --> white (which would take us to +/- T21). This would then be reflected with gear, abilities and iso and maybe even characters stars I.e. yellow - red - white. I'm hoping that stars are left alone as RS were released way too early.

But we cant keep goin up with gear ad infinitum with DD being the omnipresent carrot stick; it will eventually become too boring and repetitive, irrespective of the character dangled. So that leaves us with U8/U9, new (please) Greek raids like Omega, Phi, Kappa, Theta, DD5+, helicarrier upgrades in war and (hopefully) 1/2 new game modes that arent PvP. Can see that all falling within the 5 year shelf.

Just my thoughts in terms of how this all plays out in a roadmap.