This is a risky signing if it goes through. Taking some young brazilian/argentiniean straight out of their league, and then putting them into one of the biggest teams in europe, usually goes wrong. This is what Barca was doing under gaspar with geovanni, rochemback, saviola, riquelme, etc, and none of them ever lived up to all the hype generated in south america (remeber, riquelme was player of the year in south america just before he made the switch to barca).
Of course Robinho can be a different story, but if the current madrid team keeps on playing like they do now until summer, the whole club is gonna expect some kind of saviour to arrive. This means that tremendous pressure will be on any new signings, which is usually what young talents crumble under...