The disappointing thing is, Nexus has at least TWO sets of components they could’ve drawn on.
Funpub: Heatwave, Skyfall, Topspin, Landquake and Breakaway.
Or
Covenant of Primus: Mainspring, Chandrive, Clocker, Pinion and Cannonspring.
Hell, they could have even made him a Duocon torso of 2 bots.
The idea of his multipurpose combiner is good. But the execution, not so much. I mean, I get trying to fit all of the 13 Primes in the line, plus other figures and combiner and suchlike is a tough balancing act. This whole thing reminds me of Combiner Wars Galvatronus and his limb stealing. Or the single release Scattershot/Betatron thing.
So now, the only way to do an independent Nexus, would be for Hasbro to (hypothetically) sell a set of repaint/retool figures. Each with a frame piece.