Ferrari Driver Academy starlets Robert Shwartzman and Marcus Armstrong are tipped to remain with Prema Powerteam for next season's inaugural FIA Formula 3 Championship.
Shwartzman and Armstrong were both race winners in the final year of the governing body's F3 European Championship, with Russian Shwartzman claiming rookie honours and third in the overall standings.
While staying with Prema is logical in both cases, speculation has linked New Zealander Armstrong with a switch to Hitech GP, whose boss Oliver Oakes gave him his chance in international karting and has mentored much of his career.
But Prema is believed to be the most likely destination for Armstrong, who led the Euro F3 rankings for much of the season before his results dipped in the later events.
The other driver in the three-car team is expected to be another European F3 race winner in the form of Jehan Daruvala. He has been with Carlin for his two F3 seasons, and is likely to lose his Force India connection now that the Formula 1 team is under new ownership.
Prema boss Rene Rosin would only tell Autosport that "no drivers have been signed yet".
New Red Bull Junior Juri Vips, meanwhile, looks set to join Hitech for FIA F3 after a strong rookie campaign in European F3, in which he lost the rookie title to Shwartzman in the final race.
A deal with ART Grand Prix looked all but done at the time of the final Euro F3 round at Hockenheim, but a change of approach has steered the Estonian - whose Red Bull backing only came into force for the Macau Grand Prix and has not been confirmed for 2019 - towards Hitech.
Vips's mentor Marko Asmer did not want to comment on the speculation.
Two more Euro F3 race winners - Renault F1 junior Sacha Fenestraz and early-season points leader Enaam Ahmed - are also understood to be in the frame at the Silverstone-based team.
ART looks likely to run Max Fewtrell and Christian Lundgaard, the champion and runner-up respectively in this season's Formula Renault Eurocup, and both of whom are on the Renault F1 junior programme.
The other driver is tipped to be runaway Euroformula Open champion Felipe Drugovich - the highly rated Brazilian narrowly lost out to Vips and Armstrong in the close battle for the 2017 German Formula 4 title.
Vips penalised at Macau
Vips has lost his seventh place in the Macau Grand Prix after being penalised 40 seconds for overtaking under the red flag.
Vips, whose father Juri Sr passed away from illness less than 48 hours before his son flew to Macau, said he overtook Marcus Armstrong literally as he passed the red flag for Sophia Florsch's accident, and he gave the position back.
"It doesn't matter whether it's P7 or P-zero to me," he told Autosport. "I had no chance to see the red flag, and they used no video and no data in their decision."