Does it appear to be the original artwork being used for S3+? Sternbach's art is gorgeous, I just happen to prefer the solar system montage.
Having seen the SD version of the orginal Season 3+ title theme probably over 1000 times, I would say yes this is still the original art work. There is some contention about this with people voicing concern about stars being too visible through the dust cloud around the proto star. However, I have to dismiss this as lacking SD detail in the previous presentation. Those stars are very fine and would easily be lost at lower resolutions. Apart from that it looks entirely like you would expect. It being the original is also supported by some tiny white scratches of film damage that can be seen which surely would not be present in a recreated intro.