Well, if I were to flesh it out more...
In the other world, the Gods and Evil Gods would hold a contest every century or so to see who gets to rule over the world for that hundred year period. Both sides get an avatar representing them whom they can summon from another world(Earth), AKA the Hero and the Demon Lord respectively. And now that another hundred years had passed in that other world, another contest will be held.
The Gods, seated by the round table, chose a this one guy to be their Hero because he already has incredible stats and sent truck-kun to kill him, since he needs to be dead in order for them to send his soul to their world. But much to their surprise, he avoided truck-kun with ease because he obeyed traffic laws. So they try other things to kill him, but still fail each attempt.
Then eventually, the Evil Gods also chose that one guy to be their Demon Lord for the same reason and sent their own truck-kun, which failed to kill him.
And so the cycle continues with gods on both sides trying to kill this one dude and failing each time because as mentioned, he already has incredible stats before even reincarnating into another world.
That's my idea on the premise. Basically, a comedy story revolving around the Isekai Gods trying to kill this one dude who has no clue about their affairs.