some things got confirmed in last few days:
- Toro Rosso will switch from Renault to 2015-spec Ferrari PU for next season. Also, they confirmed that both Verstappen and Sainz Jr. will remain with the team
- Red Bull will still use Renault PU, but they will have to pay full price on them. Also, because they helped Renault with developement they will continue to develop it differently together with Ilmor and those PUs will be re-branded as TAG Heuer which came as new sponsor after 30 years with McLaren. Also, Renault will cancel their sponsorship through Infiniti brand
- Manor has some new sponsors and they also have confirmed their deal with Mercedes for PUs next year
- Race calendar was also confirmed with 21 races
Code:
20 March Melbourne
3 April Bahrain
17 April Shanghai
1 May Sochi
15 May Barcelona
29 May Monte Carlo
12 June Montreal
19 June Baku
3 July Red Bull Ring
10 July Silverstone
24 July Hungaroring
31 July Hockenheim
28 August Spa-Francorchamps
4 September Monza
18 September Singapore
2 October Sepang
9 October Suzuka
23 October Austin
30 October Mexico City
13 November Interlagos
27 November Abu Dhabi
- Rules regarding tyres have changed too. Pirelli will introduce 5th dry weather compound in the shape of Ultra-Soft which will be recognized by purple markings on the sides. Drivers will also have 3 different compounds available for the GP instead of 2 like in previous years. Each driver will also be required to choose for themselves which 3 compounds will they want to have for each GP and number of sets totaling in 10 dry tire sets. Extra 3 sets will be choosen by Pirelli. Drivers will still need to use at least 2 different compounds in dry races.
EDIT: Seems that Red Bull and Renault had actually reached an agreement where they will work on fixing that PU together. Different name for the one in Red Bull's car will be due to Renault wishing to have attention on their own team. And there is a funny bit of confusion around them for next season. Deadline to register for next year's championship has already passed and team has already registered under the name Lotus Mercedes. It is not possible to change the name of the team for next season (unless FIA allows them some special dispensation) so it is certain that we will have Lotus Mercedes powered by Renault engine

Last time something like that happened was in 2010. After 2009. season has ended BMW decided to pull out and Sauber decided to once again go on its own again with Ferrari engines. But due to the same reason that I stated above team was oficially known as BMW Sauber Ferrari