See I'm sorry, Dave, I'm afraid I can't do that. for the answer to the question about displaying B2 content in an Ultra course. You can probably guess by the title, no is the answer.
I'm writing this post because we've had an additional question surface as Blackboard Partners have started providing LTI integrations in addition to their B2s. The question being, "When I convert my Original course to an Ultra course, will my B2 links automatically be converted to the LTI link for the Partner content?" The answer is "No*."
*Except for a few Partner Cloud partners who are working with our team on a "migration tool" for their content. More details to come later in 2019.