Firstly, really nice topic 😊
Now, there r 5 things which i feel might happen:
1) Damon after knowing that Elena now is a vampire, will for sure not leave town like he promised Stefen and will be helping his brother n Elena in tackling the situation
2) In the initial episodes, we might see Damon ignoring Elena coz he knowz that Elena remembers everything now and he will be pretending to be bad more that actually, effortlessly being "bad"
3) Since Elena has chosen Stefen she'll def try to stick to what she has decided, but now being a vampire, her emotions r heightened and it'll be extremely difficult for her to keep herself away from Damon.
4) Damon's not so favorable...or say ferocious behavior might keep Elena distracted and it might get her more close towards Stefen
5) Since Caroline will be helping Elene with the company of Stefen, like we know, we will be introduced to a track where we might see another angle of "likeness"...so this might again lead to a situation where we might get some Delena confession scene...but this might be somewhere towards the mid of the season..or may be even towards the end