Good idea,i do not thought about that.
Back to story - made money,and murder Palpy before he become too important.
Trying warn Jedi or Padme would be indeed stupid.
hidden underground base would be good no matter what they decide to do.
To be honest,it is first thing they should do,they could save Galaxy later if they want.
Then,he have choice:
1.Risk his life to change History,when his actions could made it worst
2.Do notching,becouse good side win without his help in the end.
Did Kevin watched SW? if so,he could eityher try to help or run for his life.
I would choose second option - everytching end well ,so why change and risk something worst ?