Who can answer this whiz question regarding BPM transition + bar/time (beat matching BPM)

[ssienn]

Dear readers,

Who can answer this question?

This song I'm working on has a Trap (genre) verse in an EDM track. Host BPM is 128. Will automate the BPM up in the 8 or 16 bar trap verse.

The goal: The trap verse (8 or 16 bars) has to land right on the on the first and last kick in the 128 BMP structured song. To make it more DJ friendly of course when I demo it in clubs.

Can anyone calculate accurately (unlike weather stations)what the correct BPM is to use in the trap part to achieve this?(remember haven't decided either 8 or 16 bars) In essence beat matching the BPM during automation/transitions.

or

If not, any source information you can link me up to?

[ssienn]

Perhaps 135 bpm will do?