Will this game jam accept spin-offs of pre-existing IPs made before the jam? My studio would perhaps be interested in reimagining our 3D characters in a 2D space within the game jam period, i.e. the IP exists beforehand but each individual asset will be made from scratch specifically for the game jam.

Hi Harry! That's perfectly fine if your studio owns the existing IP and you'll be creating new assets as well. Sounds like a fun idea!