Do you expect an OOT release announcement at the Celebration this year?
There are at least two obvious reasons that may justify a release.
1 -Releasing OOT just before the first sequel would be a huge promotion for the new trilogy and pump up the hype.
2 - 2015 is the 20th anniversary of the last home video release of the OOT, which is a nice round number to be used as a promotional material.
If they are going to release the OOT, it makes sense that they do it in 2015, if we don’t hear anything about it in few days, I think we will not be getting it until the new trilogy is completed, or maybe never.