Tri is terrible. You can check it out for yourself and see how you feel, maybe you'll like it more than most people, but it won't matter for the new movie. Tri was made by a completely different staff that never really got a handle on what made Digimon click. Last Evolution Kizuna and now 02 The Beginning are made by a collaboration of staff from the original Digimon Adventure (most importantly Seki Hiromi) and a new generation of young talent who grew up with Adventure. They have functionally 0 to do with Tri and while they don't remove it from canon, they do practically ignore everything that happened in it.

So tl;dr, it's not worth watching and you won't need it to understand the new movie, but you should watch Last Evolution Kizuna first.