In the aftermath of much Halo porting discussion, a fellow member of BoT passed along this interesting tidbit:

Halo will most definitely be coming to the Sega Dreamcast. I get this thru the mill, as I have a friend in the industry... one of those things.

There are also talks to bring Oni there, though these are not finalized.

The domination has begun...

While I can vouch for the source, plans do change over time. Still this is something to watch out for, quite possibly the first signs of Bungie benefitting from the Take Two interest acquisition.