"What's likely" is, sadly, optimistic. I see that LISA's isn't likely to be built by the 2020s.
Reviewing the list of other space telescopes, WFIRST is now WFIRST-AFTA, with a change to use a second-hand NAO telescope.
NuSTAR and IRIS are two launched Small Explorer missions since 2010. (Oddly, they used an artist's concept of WISE to highlight the concept. Odd, because WISE was launched in 2009, so a 2010 publication should not have needed a concept image.) I haven't figured out what the new missions are/might be, but I didn't look too hard.
The International X-Ray Observatory has had a "reboot", to ATHENA (Advanced Telescope for High Energy Astrophysics). NASA withdrew from IXO.
"What's likely" is, sadly, optimistic. I see that LISA's isn't likely to be built by the 2020s.
Reviewing the list of other space telescopes, WFIRST is now WFIRST-AFTA, with a change to use a second-hand NAO telescope.
NuSTAR and IRIS are two launched Small Explorer missions since 2010. (Oddly, they used an artist's concept of WISE to highlight the concept. Odd, because WISE was launched in 2009, so a 2010 publication should not have needed a concept image.) I haven't figured out what the new missions are/might be, but I didn't look too hard.
The International X-Ray Observatory has had a "reboot", to ATHENA (Advanced Telescope for High Energy Astrophysics). NASA withdrew from IXO.