From the current crop of rumors, it looks like my prediction from April (quoted below) is still pretty close to the mark -- although there's a chance the new line might be introduced today as well:
I still have a really tiny hope that that the MBP's ODD will be upgraded to a Blu-Ray drive, but since there's not even been a rumor of that, I'm thinking it won't happen. But as I've been saying for months, the ODD isn't likely to go away any time time soon, no matter how many people here really hate it...
MBA updated by late summer: Retina display, Ivy Bridge, generally higher specs.
MBP update sometime in the next few months: Ivy Bridge and spec updates, including possibly a discrete GPU for the 13", but with an ODD and all ports and features still intact. No retina yet - I think that's still a year off for MBPs. Possibly BTO option to replace the ODD with an SSD. 17" model maybe still supported in this refresh, but it may be the last one. No format redesign.
The new line in the fall - THIS is where they'll drop the ODD and do a new redesign. Think along the lines of the 13" MBA with a hard drive or SSD, expandable RAM, and GPUs. Maybe no Ethernet. Might be retina display if large retina display prices are cheap enough by then. Probably the machine some of you have been wishing for with the MBP - at a lower cost.
I still have a really tiny hope that that the MBP's ODD will be upgraded to a Blu-Ray drive, but since there's not even been a rumor of that, I'm thinking it won't happen. But as I've been saying for months, the ODD isn't likely to go away any time time soon, no matter how many people here really hate it...