Everything basically happened within a few days regarding WCW. The announcement of their purchase was made the same day Shane McMahon showed up on Nitro. Of course the finalization of the deal had to take place but it all happened fast for WCWNo, WWE did not buy WCW in a day. It didn't take months, but it also didn't happen in a day or two.
Plus, by then WWE was pretty much just buying the WCW video library and their IP.
WCW had no TV deal at the time, which is what ultimately killed them.
Big difference here.