Both shows make a lot of sense for the block
Escaflowne is a show along with Slayers we know Toonami would have aired back in the day had they been able to get the rights, in addition they've shown their not afraid to air older HD remasters of shows and have been open to such things.
OPM and JoJo are the two biggest new series that are highly requested, OPM seems more likely only due to the rights issues surrounding JoJo and it's shorter length.
I wouldn't expect Escaflowne HD any time soon if only because the turn around time with these remasters seems to be on the labiours side due to difficulty in obtaining materials.