I'm probably opening myself up to plenty of criticism and risk looking like a right fool in a few days time but if i was a betting man I'd say AMD are going to mainly announce 7nm GPU's and talk about all the other upcoming 7nm products they're planning to release this year, i suspect we're going to be told that they'll be releasing 7nm Radeon Pro's, 7nm Vega FE's, and 7nm RX Vega's in this QTR.
My reasoning is that we've already got a very limited range of 7nm GPU's in the form of the Instinct MI60 & MI50 so they've probably built up a bit of stock from binning, the reduction in both power and die space afforded by 7nm on GPU's would be a real benefit to AMD GPU's right about now, performance per watt is very important for HPC, server farms and the like, whereas for us consumers it could mean more shaders, TMU's and ROP's without going even crazier on power draw (current Vega is something like 300W) while also keeping die size within reasonable limits (iirc 600mm is close to maximum and Vega was around 500mm).
I also think they'll provide more details on 7nm EPYC, perhaps we'll get some details on some of SKU's core count, maybe a bit about cache sizes, details about the I/O die, etc, etc. Nothing to detailed. They'll probably announce a Q2 release, they'll probably say pricing and more details will follow closer to launch.
They'll probably give some broad brush strokes on 7nm Ryzen with an expected launch in Q3.
No doubt that's all completely wrong and I'll look like a right plumb in three days.