Mark isn't sure what he said at the 2012 SDCC Flesk Publications panel that was misconstrued as him announcing that the Xenozoic story he would be working on next would be a continuation of the storyline he left hanging at the end of Xenozoic Tales #14. The truth is, the Xenozoic story he will be working on after concluding Storms at Sea will be a stand-alone. One of the reasons for that is to create an easy entry point into the Xenozoic world for new readers. More importantly, he is excited about the particular story he has in mind, which will showcase Jack and Hannah's uneasy relationship, as well as giant bees.
If that stand alone story comes out well, then he hopes to get back to that vexing unfinished storyline...
Also, Mark is at this point undecided about what format the new Xenozoic story will take. He is considering both illustrated prose ( as is Storms at Sea) and comics as options. But, at this time, the decision is still up in the air.
Did we mention that there would be giant bees?