That was 2 years later though. There's nothing on Enter the 36 that's more of a single than anything on Forever. They've always released unconventional tracks as singles, all through their group and solo runs. Hellz Wind Staff could've been a single, Severe Punishment...The City, Impossible, A Better Tomorrow, The Second Coming...even Black Shampoo were primed for radio, having melodic hooks or typical song structure. Reunited was the 3rd single and got 0 airplay. So from August 97 to probably June/July 98, there was 0 Wu-Tang on the radio - not even Triumph or It's Yourz. I do know Ghetto Superstar was late Spring/early Summer '98...so that probably ended the drought. Your talking about the number 1 or 2 album having promotion halted on it. And Forever was supposed to lead into Deck's album for a '97 release, so putting on The City as a single would've definitely been the next move.
As for soundtracks and comps, In tha Beginning had Sucker MC's - no radio, that track off Rush Hour that Dame Grease did - no radio, and they pretty much ran the entire Rush Hour soundtrack, The Worst w/ Onyx video got run, but no radio. Off Hoodlum, So Good w/Rae got some video play but no radio, Dirty's Minnie the Moocher got no radio play and that could've easily been a runaway single...especially behind Mobb's Hoodlum.
Rae & Meth were the 2 biggest at that point, and for their 2nd albums - radio was virtually silent on them. Judgement Day was Meth's lead-in single and got no burn. Breakups to Makeups was the track that did, and that was '99 after they eased up on them. Rae was damn near invisible from radio. But as I said, it didn't help that the group also said eff it at that point...and didn't boguard their way through the streets. But by the time the ban softened, too much was different.