@King:
Even then, expecting a tag team against Doula Mongo is unlikely because it would undermine Luffy's achievement. There would be no satisfaction in seeing Doula getting ganged up in order to be defeated, especially when Luffy's been breezing through his NW fights.
People who think Luffy and Law vs. Doula Mongo would be ok… no, it wouldn't. It would only make Luffy (and Law too) look bad, especially when Zoro is having such an easy time against one of Doula's top executives.
To be fair, none of the seats managed to show anything close to what DD can do. Even vergo, who has same rank as the seats( elite officer), got defeated easy by law once he got his heart back.
Not to mention that Luffy doesn't like getting helped in fights and even says so against the Colosseum gladiators.
And the Supernovas will grow alongside him.
Luffy and Law team struggling would be even worse. It would make Doula Mongo look like he's on an entirely different league.
That would be as disappointing as Luffy just cubstomping Doula Mongo. The point here is not that Luffy must struggle.
DD is not the average arc boss. Even with the 2 years, luffy din't have that easy time with hody or cc, who should be the average arc bosses. DD was introduced years ago, he was there in the war of the best and able to tango with them, he clashed with admirals, beat/play with some vice admirals like it was nothing.
After the yonkous, admirals, mihawk, DD looks right after them, as in part with the big names in One piece.