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ia it...

1 To launch a new product to the market

2 To launch a new product on the market

3 To launch a new product in the market

4 To launch a new product for the market

thank you very much
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Generally, 2,3 and 4

2 - more aggressive, as if you are surprising the market from outside, or it can be felt as if launching it like a boat on the surface of the market (rather than in it)
3 - gentler, as if you are already part of things
4 - gives the feeling of being a benefactor

d
Comments  
thank you so much for a very clear and useful answer!