Well, it's not really that interesting since DS holds every record.
Q1: June 2007, 6.98M
Think NSW will eventually take the Q3 record, either this year or next year. If they can drop the price-points to 169.99/249.99 for Lite/OG and get a new Zelda/Pokemon out next year in the holiday quarter, I think they can move 13-15M units.
The other quarters will be tough. We'll see what happens with Q2 - given that they moved 5.7M with stock problems in Q1 this year, Q2 could be close (JP is already trending stronger and Obon will provide a boost).