If I recall correctly, there were two new cabs mentioned initially. One, the 1516 (?), was paired with the MiniMega and didn't strike me as being a lightweight option. The other was a 112 cab that was paired with the MiniMax. Both were the new PVH series. Now there seems to be three more new cabs from that line. A 210, 212 and a 410. This video seems to cover all of the new stuff unless something additional is in the works....
Depending on what your definition of lightweight is, the 112 might fit....
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Shipping Weight: 32 lbs
Shipping Dimensions: 24 x 21 x 14 in
The 212 wouldn't in my opinion....
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Shipping Weight: 75 lbs
Shipping Dimensions: 33 x 24 x 20 in
None of the PVH cabs are on the Peavey site currently and my quick search did not reveal much information on any of the cabs other than what I mentioned above...