#though then again Megatron's rise to power WAS a big igniting factor in it...

[transingthoseformers]

There's no specific designs for them, but there's actually a little bit of information in the Allspark Almanacs on their empire and how it conflicts with the autobot empire in TFA!! Swindle also mentions working with them in one of his episodes

There's a possible mention of their involvement early on in cybertronian history, a war to defend against "invaders from the sky" that sound a mighty lot like what happened in aligned, but it seems like they didn't interact again until another set of smaller conflicts over territory (I'll get the map because the TFA star map from the second Allspark Almanac is INSANE I love maps in worldbuilding) (the autobot empire and the Quintessons' are like right up against each other, and there's no way Sentinel Magnus doesn't push that border more, especially since we don't know if the Quintessons in TFA are mechanical, technoorganic, or organic, but if this is based on aligned then they're probably technoorganic)

I'd say we don't know a whole lot about the TFA Quintessons themselves, but we know about them as a possible regular enemy for the autobots outside of the decepticons

Though considering canon there's definitely an argument for Swindle or Lockdown working with the Quintessons in TFA