This one seems likely, especially based on the source...

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In comments to TVNinos about anime they'd be marketing at the recent LAScreenings, Daniel Castaneda, Director of Licensing for Toei Animation in Latin America discussed a number of upcoming titles that are being worked on and should be available in 2020.

Most interesting for us is the name "Digimon Last Evolution - Kizuna".

With kizuna translating to bonds, and it being said by the producers a few times (including in the recent V-Jump interview) at how important the concept of bonds will be in the 20th Anniversary Adventure film, it feels like there is a pretty good chance the title is either "Digimon Last Evolution - Bonds" or "Digimon Adventure- Last Evolution - Bonds".

Thanks to our friends at Digisoul for the heads up.