If I’m not mistaken, this requires L1 support. I’m wondering if there are other L2 solutions for the collision problem. Various L2 execution market protocols I’m aware of face the same challenge ( Ethereum Alarm Clock, meta-txes, batched NFTs, event oracle, etc.).
Particularly, if the recent research into RANDAO and VDFs could offer insight here, for randomly selecting a batch tx proposer for a short period.