Here is the best article I could find on this.
The Greens' surge in popularity comes after the party on Monday named co-chair Annalena Baerbock, 40, as its first candidate for chancellor. The nomination of Ms Baerbock, a centrist who advocates a greener economy and a tougher foreign policy stance on Russia and China, has been widely praised.
Hopefully the Christian Democrat Union won't be on top any more.
SPD is down to 15% - from 38% at the tail end of the Schröder years. Note the -54 seats in the pic. They're declining steadily as their electoral base (boomers who have always voted SPD) keeps dying off.
The CDU/CSU is taking an even harder hit in polls rn, but that's hardly surprising as picking their candidate was a complete shitshow, there's so many corruption scandals around them that even conservatives have a hard time ignoring them and the guy they went with as Merkel's successor, Armin Laschet, is a complete laughingstock constantly botching covid policies in his state.