I'll guess GH moves to 2, and the two announced shows are given half hour slots, or the OLTL replacement never materializes, or is reserved for one of the ABC cable networks.
If ABC were to move GH to 10am, it's basically setting it up to be cancelled, and they might as well cancel it. Perhaps the intent is to cancel it, and ABC is just saving face by not having all of its soaps cancelled in one fell swoop.
It would also interfere with Rachael Ray, and I'm guessing WABC, WPVI and WTVD will still want to keep her on their lineups.
I think even moving it to 2pm might affect its audiences as well though. I remember hearing that high school kids would watch it back in the day, but most anyways, get home before 3pm. I'm not sure if that age group is still interested in GH, given that the internet, the smartphone, dvrs, and access to many cable networks etc. provide more entertainment.
If the idea is for a 2pm soap, ABC might as well merge the GH and OLTL storylines, most popular cast members to one soap if possible.