Don't really know anything about Cottrell beyond what's on their website, which I take it you found .
Some of the other Narragansett beers (other than the Lager and Light brewed by High Falls) have been brewed by RI's Trinity Brewpub - I guess the draught versions of the Bock and the Porter? Looks like the new owners of 'Gansett are considering abandoning the "retro/revival" aspect of the beers, because there were rumors of a "Narrangansett Cranberry Kolsch".
I'd much rather see a revival of Croft Ale and Pickwick Ale. I really miss nice hoppy golden ales- and that brewery specialized in them, with those two and, of course, Ballantine XXX Ale and the short-lived Ballantine Brewer's Gold Ale.
Speaking of Narragansett, I came across an interesting story from the mid-1990's in which the brewmaster of another RI brewpub, Union Station, "tours" the abandoned Narragansett brewery- which closed without notice, leaving personal items on desks and full bottles still on the bottling line over a decade later.
LAST CALL AT NARRAGANSETT
One more reason to avoid the products of the "Pabst Brewing (sic) Company"- the horrible way over the years they've treated their employees and retirees- from all their now-closed breweries of Pabst, Pearl, Falstaff and General . Even worse than what they've done to their beers.