Data Ravelさんのイラストまとめ

After analyzing Juri's thoughts, the D-Reaper comes to the conclusion that human thinking is illogical and all humans and human creations are foolish.

By capturing Juri, who was immersed in her feelings of sadness, and putting her in its kernel, the D-Reaper tries to increase these feelings inside of Juri, increasing even more her despair, since this increased the power of the D-Reaper.

This thought processes is only leading to destruction, it is described by the D-Reaper as being what humans recognize as "sorrow". And the D-Reaper's thought is to glorify the beauty of nothingness, everything must return to "Nothingness".

Unlike in the DW where it deleted everything, in the RW we don't see the D-Reaper delete. It explains that this is because the analysis of organic lifeforms has not yet been completed. And Juri is being a fascinating sample, since she has a similar thought to that of the D-Reaper

At the same time that the D-Reaper woke up and started to act, Juri is saddened due to Leomon's death, which made her "shut" her own heart, blaming her own sadness and claiming that whatever is unnecessary should be eliminated.

About the D-Reaper, it is described that everything that touches it is immediately erased from existence, reduced to nothing, what is said by Zhuqiaomon "to taint the sacred land with darkness".

This being, the "Digi-Entelechy" (デジ・エンテレケイヤ), is the one that contains the "Light of Evolution" that due to the desire of Qinglongmon was transformed into a Digimon, sealing its light to not allow evolution without limits.

We know that this power is now in the form of Culumon, a Digimon body for the power that has long given evolution to the Digimon.

The island also appears in the game "Digimon Collectors", in a event that repeats what happens in the movie. It is said that the island can transcend dimensions and is a place of war where it is rumored that two beings were sealed on the island.

The same goes for "Light" as positive feelings or goodness, already existed. Adventure just related these concepts to "Evolution" and "Non-Evolution". But anyway, regardless of whether or not it was created in Adventure, it is still used today within the Digimon franchise.