During their WonderCon panel, IDW Publishing just announced with musical fanfare (really!) a Rocketeer/Spirit crossover written by Mark Waid and illustrated by Paul Smith. The four-issue miniseries, titled "Pulp Friction," will be published in July, 2013.
Waid most recently penned the adventures of Cliff Secord in "Rocketeer: Cargo of Doom" with his current "Daredevil" partner, artist Chris Samnee. This will mark the first time he's written Will Eisner's classic character The Spirit and the first time the character has appeared in new stories since DC Comics' last "Spirit" title ended in 2008.
Check back with CBR soon for more on this and all of IDW's WonderCon Anaheim announcements!