You could treat PotP Inferno as a
Generations version of Fire Chief (the Hot Spot redeco from
Operation Combination) with more distinct heads, and use him as the basis for a Generations Guard City. On the customization side of things, his red parts would make doing a Combiner Wars G2 Hot Spot easier.
I finally got around to photographing Volcanicus.

A basic frontal shot. You can see that I've painted the optics on mine blue, I just personally prefer the look of them that way. I have plans to make some custom weapons for him, a sword at the very least (And it will be an original design that matches the aesthetics of the Dinobots' individual swords, NOT an uscaled FOC Grimlock sword). But he's awesome even without a dedicated weapon.

Armed with the Cloudburst Decoy Armor's weapon mode. I like this as a weapon for him, because it kinda-sorta resembles Grimlock's Twin Stunner Laser.

And finally, the picture I've been planning on ever since Volcanicus was revealed. The Dinobots using the might of their new united form to enact SWEET COMBINER-Y REVENG on Mindwipe for what happened in the first battle of
The Headmasters