Heroes in Crisis remains as planned. Tom King fell behind while working on TV pitches, so Batman 64-65 will crossover with Flash in a story written by Williamson dealing with the ramifications of HiC so King has time to catch up. This has pushed back his plans by two issues.
Except that King is still attempting too keep milestone events on nicely numbered issues. So his main story will still end at 100 but will have two extra issues afterward (101-105) to deal with the ramifications of the ending.