Have Tiger Woods 2010 preordered. It comes out the week of the U.S. Open in the States, and I plan on playing against Tiger and my buddy online while watching the Open picture in picture. The dynamic weather is cool too. I was sold on all of this even before the disc golf was announced, but that REALLY made it a pre-order for me.
After that, I'll pick up Wii sports resort, but will probably hold out on buying attachments for my other 2 Wii Remotes, unless some there is a really cool 4 player mode in the game we dont know about yet.
4 player tennis is great and all, but i love wii tennis the way it is already. Furthermore, playing with 4 people all fully swinging their arms in my apartment seems kinda dangerous.