New battle modes?

Is there anything other than baloon battle? like coin runners or um... Shine Runners? I just want to know. and if we dont, here is a sprite for you. - https://images.app.goo.gl/4gBYkViMdRJ4cs8B9

And Are there Bikes as an unlockable?

There's Balloon Battle, but if you set item distribution to Bob-ombs only, you get what's essencially Bob-omb Blast from MK Double Dash