According to the SW.com link above:
Lastly, for the true bounty hunters, several store exclusive figures are available this May as well. The Clone Wars microseries-inspired Republic Gunship and the Hunt for General Grievous Battle Pack
will be available exclusively at Toys R Us stores. Exclusively at Target stores, look for the Demise of General Grievous super-premium 3.75" figure and the Skirmish in the Senate battle pack
I assume the Hunt for General Grievous Battle Pack will be the 5 clones, whereas the Skirmish in the Senate is the Yoda, Emperor, and Shockies.
Those are some sweet looking clones.