Yes, it all really does depend on the quality AND a good promotion. I mean, if he for example, appears with Walsh during bootcamp of The X Factor and then sings a song on the show, that would be a great start. Not to mention doing various radio and tv shows.
I really hope London Records treat him right because Syco truly ignored Westlife in the last couple of years. I'm pretty sure he will also release 2nd single before the album comes, that would be a great move.
Also, it seems that people are interested in his solo stuff as he was trending worldwide on Twitter on the day his website launched - so hopefully, he will have more success that Ronan had with his last album.