NATO is overdue for a new MBT, but we're still lagged in Bush-fire mode, designing and building stuff for Middle Eastern conflicts rather than to go toe to toe with Moscow. By the time we've caught up, it'll probably be China that we'll be squaring off against.
I know the Leopard is getting a new version at some point, and honestly IMHO it would make sense for Britain, France and Germany, and even the US if they want to, to get together and pool resources to make a standardized tank for NATO, something that is high-tech but doesn't break the bank...if western weapons designers know how to make such a thing.
I mean between the UK, Germany and the US, we built three damn fine MBTs, and the Leclerc isn't really to be sniffed at even though it's always billed as the butt-monkey of MBTs.