It's not wrong to lean on nostalgia a bit with marketing. People like familiarity more often than not. There's still a lot of us who had our beginnings with MechWarrior 2 today, whether we're talking the base game, GBL, or even 2: Mercenaries, which this is, effectively, a Clan perspective of roughly the same time period. The other two MW2 games were toward the end of the Clan Invasion era, well after the invasion itself had been halted; Wrangler is actually incorrect on an official basis, as the Civil War era was quite literally defined by the FedCom Civil War's beginning, spanning from 3062-3067. Maybe these eras were defined differently in the pre-CGL years, I dunno; at the time, all I had was video games, and was ignorant of the greater universe the video games took place in. But that's how they're defined today.
I'm sure the game will be really good; provided they don't repeat the mistakes of 5: Mercenaries on launch, it might even make a great first impression. It'd be nice if we got current-era (or at least directly-preceeding-era) video games again, but it could be some time before it actually happens. For now, let's at least try to enjoy exploring the Clan Invasion one more time, from a perspective not seen in the video games to date. lol