So here's the plan for selecting Bitcoin's new PoW algorithm:

Nobody knows the new algorithm right now, and nobody will until we all know at the same moment.

At 14:00 UTC August 11th, we will begin watching Bitcoin's Testnet4 chain for new blocks.

The very next block found, look at the block hash.
The last character will choose the new algorithm.
(Note that testnet4 blocks are typically timestamped wrong!)

As soon as I see that block, I will reveal the mapping showing which algorithm that character represents.

Throughout the last 24+ hours, the community has discussed and made a short list of candidate algorithms.
I compiled that list into a weighted (according to their suitability) set of options for the mapping list.

You can prove I didn't rig it, by SHA256 hashing the mapping text file.
It will match 71a7960874f3352f4ba600ce67bd6f8e96702565abea93021fa86349d99a45e8

~22 hours until signaling BIP110 becomes mandatory for Bitcoin miners.

Mining blocks without signaling will then forfeit all block rewards!