Im just brainstorming here.

#1 Reason to fork bitcoin is to remove the Ninja mined Satoshi coins. See what I did there, the parallels to the eth attackers coins...
 

Opposite direction from
No really, I'm sure you've thought that an Ixcoin 2.0 reboot would allow for some extra freebees given to the ixcoin foundation for future developments.

Step 1. Fork bitcoin

Step 2. Add in ixcoin merge mined code etc

Step 3. Add in a special address with new foundation coins.