Amended best-guess grid 2010

*indicates far from certain, alternatives/explanation in brackets)

Brawn - Mercedes
1. Jenson Button
2. Nico Rosberg

Red Bull *Renault (Mercedes blocked by McLaren, Ferrari unlikely due to previous strife)
3. Sebastian Vettel
4. Mark Webber

McLaren Mercedes
5. Lewis Hamilton
*6. Kimi Räikkönen (Heidfeld, Glock, even Kovaleinen)

Ferrari
7. Felipe Massa
8. Fernando Alonso (not sure which way around the numbering will go)

Toyota - *will not exist, nor be directly replaced

Sauber Qadbak Ferrari
9. Nick Heidfeld
10. * (Kobayashi, Bortolotti, many others in with a chance here)

Williams Cosworth
11. Rubens Barrichello (had Toyota not left, he'd have had the number 14 he started his career with)
12. Nico Hulkenberg

*Renault (likely to stay, but not certain)
14. Robert Kubica
15. * (Grosjean, di Grassi, Kobayashi, Glock)

Force India Mercedes
16. Adrian Sutil
17 * (Liuzzi, Glock, Trulli, Kovaleinen)

Toro Rosso Ferrari
18. Sebastien Buemi
19. Jaime Alguersuari

Lotus *Cosworth
20. * (Sato, Davidson, Klien)
21. * (Trulli, di Grassi, Kovaleinen, AN Other)

US F1 *Cosworth
22. * (Danica Patrick, Scott Speed, Marco Andretti, Wickens)
23. * (Fisichella, De La Rosa, Gene, Trulli, Bourdais)

Campos Meta *Cosworth
24. Bruno Senna
25. * (De La Rosa, Gene, anyone Spanish, anyone else)

Manor/Virgin *Cosworth
26. * (Paffett, Davidson, ...)
27. * (Petrov, Soucek, ...)

For most of the new teams, all names are in the hat. We'll see come January who's going where.