[Klashikari]

Well... I wasn't expecting a confirmation, but I guess I can elaborate an alternate point

Spoiler for Chapter 3:

Monomi's involvement is extremely fishy, to the point I suspect something even weirdier than it might be.

Chapter 3 implies that Monomi is part of the Future Foundation and they were painted as the enemy, the destroyers of the world.
However, something is amiss: I don't think they would use such name, and Monomi's means are way too far fetched for "despair" sake.
Following what we know in DR1, the world is in despair state, although I suspect Junko was lying because they just can't conveniently all turn into Monokuma worshippers because of despair. So far, Monokuma is basically the "mascot" of the SHSL Despair members, so I suspect the SHSL Despair as a whole to be heind the assault and the major change in the landscape and so on.
Which means that if the world is actually not devasted, but actually in a war ridden state, that would mean 2 organisations would be required: one representing hope and one representing despair.

Monomi's actions require more than simply a pixy entity tucking so many ressources for despair people. In fact, the timing is way too perfect: after only 6 survivors managed to get out of a mutual killing, another event occur after that, but it is highjacked by Monokuma.
By extention, it also means that Junko had to stop what Monomi was trying to do. If Monokuma was trying to pull despair from the hope of humanity, what about -cleansing- despair of humanity instead? That would actually explain why she says "our plan" at the end of chap2 IIRC.

As far as I can see, Monomi (or rather the future fundation) managed to capture members of the SHSL Despair and wanted to create a beacon of hope by directly acting against despair. Thanks to Danganronpa Zero, we learn that Junko learned the memory erasure technique from Matsuda as Ryouko.
As such, it is possible that the remnants of the future fundation got information from Matsuda's studies and gained the memory erasure skill.

In any case, it explains why Monomi is extremely frantic about hope shards, but also that people do not doubt each other, even if a culprit is obviously there. That is not only she doesn't want more casualties, but also because it would be dangerous for the students to remember their memories (That's why Monomi vaguely stated that they should move forward and don't look at the past when Monokuma prompted Monomi is hiding something from them).

This also explain why Monokuma revealed right from the bat the "traitor" and the "amnesia". I initially thought it was a ploy from Spike Chunsoft to betray players expectations, but that's in fact part of the plot: Monomi's fluffy antics weren't just for the kicks, and her actions were to fulfill a purpose, otherwise, Monokuma's interference wouldn't be necessary.
Heck, Monokuma is rather pushy as hell in SDR2 compared to DR1.
Henceforth, Monokuma/Junko is trying to sabotage Monomi's efforts in a very brutal way, and laying the cards in such fashion already jeopardize Monomi's haven setup. This might also explain why the events are mirroring DR1: assuming Junko wants to prove despair will prevail, she most likely planned to make previous SHSL despair members back to despair with the mutual killing field trip, which screams "hey, see? They may have lost their memories, but they are still despair incarnate, upupupupu" or something.

Hell, Nagito raised a giant death flag in the pologue by stating "aren't we going to kill each other?" when Monomi explained everything. That definitely stems from his despair persona, and this is probably the reason why he is so broken thorough the game.

From my reasoning, I understand why Danganronpa Zero was written, because it is a major hint for SDR2.