However, the route from Alsos Veikou to Goudi was chosen, as it has the benefit of being the one passing from the densely populated areas of central Athens, such as Galatsi, Exarcheia, Kolonaki, Kaisariani and Zografou.

The Line 2 branch would have run between Panepistimio and Alsos Veikou, with intermediate stations at Exarcheia, Alexandras, Dikastiria, Kypseli, and Galatsi.

The Line 3 branch would have run between Panormou and Marousi, with intermediate stations at Faros, Filothei, Sidera, OAKA (Athens Olympic Sports Complex), and Paradissos (for Suburban Railway trains at Kifisias).

Souflias stated that the original branches, if built, would have caused "significant structural and operational weaknesses" for Lines 2 and 3.

At the same time, also in late December 2017, Attiko Metro announced the addition of a new station at the intersection of Parnithos and Agias Glykerias streets in Galatsi.

Locals claim that the "station is part of gentrification scheme aimed at altering historically leftwing and anarchist area".

[27] Section C (Greek: Τμήμα Γ),[17] as of November 2021[update], may consist of a branch from Evangelismos to the new Government Park near Dafni,[28] with intermediate stations at Pangrati and Vyronas: Elliniko Metro previously planned to build the terminus at Ano Ilioupoli.

[29] However, the September 2022 Athens Metro Development Plan reroutes Line 4 via Pefkakia instead of Perissos, resulting in the relocation of the station for Nea Filadelfeia.

[27] Section E (Greek: Τμήμα Ε)[17] may consist of a 4.4 km (2.7 mi) line from Marousi to the A1 motorway (National Road),[5] with intermediate stations at Pefki and Lykovrysi.