C2000AD was the successor to the (far more successful) BEST OF 2000AD MONTHLY. That had churned-out low-cost reprints for a decade and pretty much exhausted the back stock of black & white material from the venerable weekly.
This new launch featured colour interiors, allowing it to plunder more recent material from the weekly as well as Dredd's spin-off solo book. I don't have every issue but - presumably - it also opened-up the possibility of pulling rarities from the various spin-off annuals and specials which had different page dimensions than the weekly and BEST OF.
Fleetway's other motive: C2000AD appeared, alongside a similar reboot for the 1992 launched THE COMPLETE JUDGE DREDD (reworked as CLASSIC JUDGE DREDD), just as the 1985 JUDGE DREDD movie hit cinemas. Fleetway anticipated a sales bonanza and ensured they had plenty of shiny new product on the shelves (the kid-friendly fortnightly LAWMAN OF THE FUTURE appeared at the same time).
Unfortunately, the film was something of a flop (I'm going to stick my neck out here and say that - although it's no cinematic masterpiece - it's not a total train wreck either) and none of Fleetway's 2000AD family of titles saw much (if any) benefit from the association. C2000AD shuttered after a mere 15 issues (compared with 119 editions of its predecessor), closing out in January 1997. Its' Dredd companion managed another three issues: the 18th was the last (compared with 42 from the first run).
The lead reprint was America, the highly regarded JD strip that had kicked-off the Megazine five years earlier.