I'd be all for a mini-arc structured, post-ROTJ cartoon series where members of the OT cast make appearances, if not actual starring roles.
The way I see it, Aftermath and other new books are painting the picture of a post-Empire Galaxy where the New Republic is standing triumphant, but occupying far less space and excercising far less authority over the Galaxy than its predecessors. We're probably seeing multiple competing powers, and likely large sections of "frontier." It's the Wild West in space, with different civilized areas of control and some of them may be belligerent but too weak to challenge the New Republic to a fight. There are threats that the little guy has to avoid, and there are villains and monsters out there, but there's also reluctance towards allying with the New Rpeublic because of the history of the Galaxy. Some people join Neo-Separatist groups, some join anarchic pirate societies, some find themselves swept into the havoc of the Hutt's crumbling empire, and then there are other systems, perhaps Mandalore included, just trying to get by.
Into this chaos, you introduce your main cast. If it was me, the core characters would be new, but their boss would be a major OT character who nonetheless has a wide open future: Lando Calrissian. The cast is a combination transportation/security company dealing with this new chaos, and occaisionally having to resort to violence and espionage to accomplish their goals. The main enemies are criminals, local warlords, and secretive and enigmatic Imperial holdouts who just seem to disappear from the Galaxy whenever you've tracked them down... Cast would include ex-Rebel and ex-Imperial characters, learning to get along while the latter start to get some perspective on the Empire's actual nature. And, on occasion, particularly dangerous adventures and quests see help provided by other Saga characters, like Senator Leia Organa, Lando's competitor and Leia's husband Han, Countess Sabine Wren of Krownest, and maybe a few, quiet cameos by a wandering Jedi named Luke Skywalker, who has no problem pausing his philosophical scavenger hunting to help people.
Enemies I'd go ahead and cast? Warlord Zsinj, playing up the corporate executive angle and embracing his obfuscating stupidity for full, fun Saturday-morning cartoon villainy while keeping him dangerous and maybe having him employ ex-ISC troops as Raptors. Black Sun, perhaps run by multiple Vigos, who are trying to gobble up Jabba's territory and who Lando feels he can play off each other. And a few quiet First Order fanatics recruiting Imperial personnel and sabotaging the New Republic's peace, preferably lead by a holographic Blackhole.
Oh, and I'd have the main protagonist and team leader under Lando be a female Ex-Imperial secret agent who keeps on running onto Luke whenever he pops up, a woman who has red hair and possible Force abilities...
Yeah, Mara Jade would be the lead. I know they've said they probably won't introduce the character, but c'mon. If Rey Skywalker winds up being the real deal, which it probably should be, just from the standpoint of merchandising and buzz, then we need someone to be Mama Skywalker. And unless they have some *very* radical ideas on how to take that character concept, Mara Jade is basically a proof-of-concept that was also financially successful.