Honestly if i was trying to respect Boseman. i would use the multiverse of madness and either destory/merge the multiverse or just somehow have a young Tchalla from a destroyed multi verse enter and i would make him younger than shuri but still king. That way the parallels if any would be very few as it would be two characters in two different periods of their history. Then we can do a world of wakanda type movie seeing the wonder this young tchalla has discovering the wakanda of 616.
Or the merge aspect, a multiverse is destoryed in anything or anyone without an exisiting duplicate gets merged into the main universe but then you may have to alter history, so that probably wouldn't be the easier way.
And the character would be honoring the previous tchalla by trying to live up to his legacy