Rodimus shows up fashionably late to a scene that is nothing short of chaotic. He skids to a halt in his alt mode, dismayed by the sight. He'd thought he'd gotten here fairly fast but already things are looking messy. There are people everywhere. There's no way they're going to be able to handle this discreetly. Confirming this, he can see Arcee in the distance, decidedly NOT In alt-mode, and...Starscream? Every Cybertronian who 'd been in the war for more than a meta-cycle would recognise those legs.
Scrap, even the 'cons had gotten here first.

Rodimus transforms into robot mode, all flimsy-pretext-of-caution to the wind. It'll be easier to avoid humans this way anyhow.

Despite all the goings ons Rodimus still finds a moment, as he makes way toward the action, to smugly think to himself about the irony of Arcee being first to break cover on Earth.