I have heard that as well, what confuses me about it, which made me feel it was more of a money grabbing stunt, is that when we meet Han in Episode 4, he is already pretty young as it is, so to make a prequel of an even younger Han, who was already questionable allegiance when first introduced, just doesn't make sense. Old man Solo would of made more sense... Or just not done a Solo spin off. Just done Luke or something