A new spacecraft for long-distance space flights is being developed at the State Scientific Center of the Russian Federation "M.V. Keldysh Research Center" (part of the State Corporation "Roscosmos").
...A fundamentally new spacecraft for long-distance space flights is being created, ensuring the growth of economy in space transport operations, a significant increase in electrical power in space, and the creation of spacecraft with varying orbit parameters.
SSC RF "M.V. Keldysh Research Center"
In addition, ion engines for use on future geostationary devices, transport modules and interorbital tugs are among the prospective developments
The largest of them, ID-500, is currently the most powerful ion engine in the world.