F1 future stars

There may be many failures in GP2, but some of them are lucky and got a F1 drive, like Karun Chandhok and Nicolas Kiesa, who drove for Minardi for 1 season. There are also good drivers but could not perform in the feeder series but shone in F1, like Damon Hill and Felipe Massa. Some don't have experience at all, but they got F1 drives because of sponsership money like Giovanna Amati and Kimi Raikkonen. Some good drivers failed because they do not have sponsership, like Bjorn Widhelm and Vincenzo Sospiri. So now lets look at some other young drivers who are getting a F1 drive.
The most possible ones are Davide Valsecchi and Pastor Maldonaldo, both driving for isport and Barwa Addax respectively in GP2. Maldonado was close to signing with Renault, but it opted for Vitaly Petrov in the last minute. Valsecchi's reputation have grown much over the last few months. having won the GP2 Asia series. The other possibilities are Ho Pin Tung of DAMS and Alvaro Parente who last drove for Ocean Racing. Tung is linked strongly with Renault because of sponsership. The other choices are Sebestian Loeb and Valentino Rossi, WRC and MotoGP legends who were linked with Red Bull and Ferrari for almost three years. Don't think they will succeed though. Come on, not everyone is Kimi Raikkonen or John Surtees.
Jumping series are not a good idea, as Jaime Alguersuari and Martin Brundle would demonstrate. Both their careers are not as good as Vitaly Petrov and Ayrton Senna, who they thrashed in Formula three.