(NB. I read the French original version). Apparently, in Atlantis men can make babies with men, because there seem to be absolutely no women around anywhere, except two individuals in one picture at the very end. Also the Azores seem to be populated mainly by men, only on the very first page there are a few women seen leaving the airport. That seems a bit exaggerated to me, even for a golden age école marcinelle comic. I know they had very strict censorship laws at the time with children's books and comics being exclusively meant for either boys or girls and which basically prohibited them mixing men and women in them. Kinda gay if you ask me ;-).
The other problematic aspect here was the imperialist attitude against the "barbares" (who clearly seem to be a sort of Inkas), and the as-a-matter-of-fact genocide on them when they are all drowned at the end, with the Atlanteans only saving themselves with no effort to save the others, with the narrator text even stating that they brought it upon themselves. I feel like the "barbars" were justified in their hate against the Atlanteans with them living expelled in a desolate wilderness without any modern comforts and the other living in a hyper-futuristic civilisation.
As usual with Jacobs, there is a lot of unnecessary explaining text for things which you see in his wonderful drawings and therefore didn't need to be explained. And there is a lot of dramaturgic weakness, in that Jacobs doesn't use mystery and suspense in places where he clearly should - the reader is constantly long ahead the heros in knowledge when we could be kept guessing, for example the traitor is revealed to be a traitor on the very first page he appears, while the characters only find out in the end (which is hard to understand, especially since Blake and Mortimer see him act suspicious and suspect him), and the sabotage of their car in the beginning is also unnecessarily shown, etc. Also, the distances and timeline are somewhat unclear or seems not always to add up.
So why 3 stars? Despite all criticism, the art is as usually wonderful, and the adventure is quite an extravagant romp with so many ideas and so much going on - subterranean rivers, a subterranean futuristic society bordered by a subterranean Inca culture, subterranean flying dinosaurs and prehistoric forests with huge carnivorous plants (what do they lie from usually, because the land seems not to be inhabited and no animals except insects are to be seen), UFOs and space travelling... All in Jacobs' extremely well-done and detailed drawing style.
And despite getting frustrated by some of the adventures of Blake and Mortimer, I keep wanting to explore more of them. I'm starting to agree with another user here who said that this series is the rare occasion where the stories created after the passing of the series' original creator often surpass the originals. In some later adventures, Mortimer even is allowed to have a *gasp* female friend! The big exception is Jacobs' The Yellow M which is a masterpiece, and which by chance was the first one I read, followed by what is considered to be one of the best post-Jacobs albums, The Affaire Francis Blake. Had I begun with one of the weaker entries, I might have given up on the series.
So to anyone wanting to explore this series, I would strongly suggest to start with those two mentioned albums, "La Marque Jaune" and "L'affaire Francis Blake".
(Note: I read most of the albums in the French original, and a few of them in German. But since Goodreads is mostly in English and the series is translated to English, I wrote my review in English).