At the current juncture, the ECB together with the national supervisors is comprehensively assessing the balance sheets of 128 banks which, as things stand today, are candidates for direct ECB supervision.
If the asset quality review and the subsequent stress test reveal that banks need to be recapitalised, the need for capital will have occurred on the watch of the national supervisors – so you could say it is a legacy issue. It is therefore down to the member states in question to repair these legacy issues before responsibility shifts to the ECB.