Well if that's the case, given the timing and what they're all complaining about (as well as most of us ITT), then it can only lead to a good surprise: Series X gameplay on a Series X system at Gamescon
It's what we've all been asking for anyway, so I wouldn't mind.
They literally just released FS2020 and that's one of the highest-rated games (well, simulators) of the year. Also Gears, the Forza games, Ori, etc. Even Battletoads has reviewed pretty decently.
Not all of Nintendo's games are critical hits, either. Ultimately quality is dominated by subjection. Nintendo can never make a game like Forza Motorsport or FS2020, it's not in their DNA. MS can never make a game like Mario Odyssey or Smash Bros; it's not in their DNA. But all four of those are high-quality for their own reasons.