I saw Dragon ball when i was teenager till my 20's i think... i really liked it.
The first time i heard LTE2 When the water breaks 4:34 - 4:45 i instantly recognized Dragon ball Z theme (i don't remember which saga exactly).
A while after that i learned about DT being in the History of trunks sound track so i understood why they added it on LTE2 maybe they where like.. what is Dragon ball and they started watching it and they liked the theme and pay a little tribute.