Looks like T-Bone had huge potential. He was a captain in Water 7. In Volume 98, he was mentioned to have become a rear admiral
And in this chapter, he was mentioned to have become a vice-admiral
But a civilian taking out a vice-admiral is unexpected(especially apparently a loved one). No wonder why the marines need to take action against Cross Guild, and since it's a vice-admiral who got taken out, and with Cross Guild's growing influence(yonko crew growing in influence), they'd likely dispatch an admiral fleet, probably led by Fujitora since he is the one missing thus far, who also happens to have a quest against Shichibukais