https://www.newsarama.com/44044-stan-sakai-s-usagi-yojimbo-jumps-to-idw.html
After 24 years at Dark Horse, Usagi will be under the IDW banner for an all new #1 coming in June.
https://www.newsarama.com/44044-stan-sakai-s-usagi-yojimbo-jumps-to-idw.html
After 24 years at Dark Horse, Usagi will be under the IDW banner for an all new #1 coming in June.
I don't think having different publishers was ever necessarily a barrier to crossovers, nor was having the same publisher necessarily a facilitator of crossovers. Most of the various TMNT/Usagi crossovers have happened when they were under separate publishers, the only exception being the Shades of Green miniseries, which in fairness marked the beginning of the brief period TMNT and Usagi were both published by Mirage Studios.
https://www.facebook.com/officialstansakai/photos/a.1121007374592665/2574238075936247/