Tradepaperbacking in the '90s

Re-reading Deadpool #26 (March 1999), I noticed a footnote by editor Matt Idelson referring to the previous arc: “A somewhat condensed retelling of issues 23-25, to be trade paperbacked in ten years.”

Which wasn’t quite true. It took almost twelve years before Deadpool Classic, v. 4 reprinted those issues. I wonder what the delay was?