Seats Flipping in the 2020 Senate?

It's 13 months out but I'm going to make the following four predictions:

1.  Alabama's Democratic Senator will lose in this election. 

2.  Michigan's Democratic Senator (Peters) will likely lose.

3.  New Hampshire's Democratic Senator (Shaheen) will likely lose.

4.  Virginia's Democratic Democratic Senator (Warner) will require an awful weak Republican in order to win.

Republican losses?  At this point, the points appear more in their favor to retain all seats.  Odds here?  At least three gains....maybe four.