The one advantage DC definitely has had over Marvel for as long as I can remember is the fact that they make OGN, most of which either create their own continuities or standalone. Examples include: The Dark Knight Returns, Kingdom Come, All-Star Superman, All-Star Batman and Robin, Justice (essentially All-Star Superfriends), Superman and Batman Earth-One, and several Elseworlds stories. The initial point of the All-Star books' existence was to have standalone "timeless" stories that would essentially be definitive takes on the characters. One worked in that regard, the other is an embarrassment to the human race. Perhaps Marvel could also benefit from this, namely for franchises that have become unnecessarily continuity heavy.
For instance, the line could have a name like MARVELOUS (cheesy, I know) or something that would denote the seemingly grandiose nature of the titles, making them a must-read for fans. MARVELOUS Spider-Man would be a Kirby/Lee story but for today, but not being too updated so as to become just dated. The writer could be Mark Waid, and the artist could be Mike Allred. MARVELOUS X-Men would be a 90s cartoon team of X-Men, with Ed Brubaker writing and a 90s artist of Marvel's choice drawing. Considering that the 90s cartoon is many people;s one and only gateway into the X-Men universe (outside of the crappy movies), this would be a perfect tone/setting for a "timeless" story.
MARVELOUS Fantastic Four could be a Vertigo-esque hard science romp through the Negative-Zone, whereas MARVELOUS Iron Man would be a cross between the Silver Age Howard Hughes-esque Tony Stark (and less RDJ) and the Fraction run politics. MARVELOUS Avengers would more than likely be a throwback to the 70s era team (which I think were the definitive years).The more popular the books got, the more obscure they could become, such as a blaxploitation MARVELOUS Luke Cage and a kung fu movie based MARVELOUS Iron Fist, which could spinoff into a buddy cop MARVELOUS Heroes for Hire. Don't forget a horror movie MARVELOUS Blade.
This would be a perfect idea for fans of these characters as well as non-fans who were interested in the characters or wanted to see a definitive take on them.